Connor McCowan, 19, is charged with open murder in the Feb. 23 stabbing death of Andrew Singler, a 23-year-old Michigan State senior. Singler shared an apartment with Connor's sister, Shay McCowan, and exchanged angry text messages with both McCowans on the night of his death.

Fearing that "he would be killed," Connor McCowan "cut" Singler and was told to run by Tyler Aho, Singler's roommate. The three punches became the focal point of a particularly tense exchange between Dewane and Randy McCowan where the prosecutor wondered why this information was not apart of the initial police statement.

"So apparently, you didn't relate it to any officer that your son had been struck in the head three times," Dewane said. "Sir, you had information that your son was in a fight and stabbed somebody that was 'like a son' to you and you don't tell the police that he got punched three times in the face? You didn't think that was relevant?"

McCowan, 55, responded by saying that at that point he was stunned at everything he had heard.

"I am a parent," McCowan said. "I'm not a lawyer, I'm not an EMT, I was trying to make sense of that. I lost three kids in seconds here. I'm in shock."

Earlier in his testimony, Randy McCowan said that he had called police on Dec. 28, 2011 when Connor punched a hole into a wall over being unable to go out past his curfew. Dewane pointed that out during the exchange.

"Sir, your son has been charged with murder," Dewane said. "Did you not think it was important to tell the police that he had been punched 3 times?

"You'll call the police when he has a curfew violation, but you won't call them when he stabs somebody?"

Testimony continues before Judge Clinton Canady III in the Ingham County Circuit Court. Connor McCowan is charged with open murder.